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Chrome plating ( chromium plating) is a technique of electroplating a thin layer of chromium onto a metal object. The after product of chrome plating is called chrome. The chromed layer can be decorative, provide corrosion resistance, ease cleaning procedures, or increase surface hardness.

d-orbitals have double dumb-bell shaped.
The four different orbital forms (s, p, d, and f) have different sizes.
All s orbitals are shaped spherically and have spherical symmetry.
A p-orbital is dumb bell-shaped

Transition elements (also known as transition metals) are elements that have partially filled d orbitals.
IUPAC defines transition elements as an element having a d subshell that is partially filled with electrons, or an element that has the ability to form stable cations with an incompletely filled d orbital.
In general, any element which corresponds to the d-block of the modern periodic table (which consists of groups 3-12) is considered to be a transition element.

NaH is an example of ionic hydride which is also known as saline hydride.
Hydrides are binary compounds of the elements with hydrogen.

The process involved is called dialysis. The process of separating the impurity particles of true solution dimensions (crystalloids) from an impure sol by means of diffusion through a suitable membrane such as parchment paper or cellophane membrane is called dialysis.

When soap / detergent is added to water, it decreases the surface tension of the water. Compounds that lower water’s surface tension are called surfactants, which work by separating the water molecules from one another.

? The haematite is heated in a current of air, while heating the impurities like sulphur, arsenic, moisture etc gets removed.

? The haematite thus obtained is then reduced in a blast furnace

Gas laws, the laws that relate the pressure, volume, and temperature of a gas.

The Ideal Gas Law cannot be applied to liquids , vapours etc

? Property of metals capable of being drawn into thin wires: Ductility

? Property of metal to produce sound: Sonority

? Ability to conduct heat and electricity: Conductivity

? Property of metal to produce sound: Sonority

? Ability to conduct heat and electricity: Conductivity

? Property of metals capable of being drawn into thin sheets: Malleability

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